(1) Install an O-ring on the mounting surface of the fuel injection pump driver housing of the Mitsubishi S6R diesel engine. Apply Threebond 1212 to the flange.

(2) Install the fuel injection pump driver on the rear plate.

(3) Tighten the bolts to the specified torque.

4.7 Installing the idler gear

(1) Place the Mitsubishi S6R diesel engine crankshaft at the top dead center position of No.1 cylinder.

(2) Apply lubricant to the idler shaft.

(3) Install the idle gear after aligning the assembly mark.

(4) Install thrust plate on idler shaft.

(5) Tighten the bolts to the specified torque.

(6) Check that the assembly marks of the timing gear match the illustrations.

4.8 Measuring the axial clearance of the idler gear

Measure the axial clearance of the idler gear. When the limit is exceeded, replace the component that caused the failure.

Test items

standard value

Limit value

Axial clearance of idler gear

0.2 to 0.4 mm

0.6 mm

4.9 Measuring Backlash of Timing Gears

To measure the backlash of a timing gear, place the dial indicator on the circumference of the gear pitch circle and make vertical contact with the tooth surface to measure the amount of backlash. Replace the new gear when the limit is exceeded.

When it exceeds the standard value, check the tightening condition of the bolts, and whether there is any foreign matter adhesion on the mounting mating surface.

Test items

standard value

End runout (reference value)

0.285 mm or less

Radial runout (reference value)

0.127 mm or less

4.15 Installing a speed detection sensor

(1) Rotate the crankshaft of Mitsubishi S6R diesel engine so that the tooth end of the ring gear is placed in the center of the mounting hole of the speed detection sensor.

(2) Screw the speed detection sensor into the mounting hole by hand.

(3) After the tip of the speed detection sensor is in contact with the toothed end of the ring gear, loosen the speed detection sensor so that the gap between the ring gear and the sensor is within the standard value range.

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